Server Only Setup

It is possible to enable a smaller subset of the extensions aimed at server
serving repository. It skips the additions of the new commands and local UI
messages that might add performance overheads. To use the server only
extension, install the package and use:

Extension Purpose

The goal of this extension is to provide an appropriate place for code and
concept related to changeset evolution to mature. In this extension we allow
for hackier code, unlocking quick experimentation and faster iterations.

In addition, the evolve extensions support a wider set of Mercurial version,
allowing us to reach a larger user base for feedback. The Evolve extension is
not tight to the Mercurial release cycle and can release new feature and bug
fix at a higher rate if necessary.

Once a concept is ready enough, its implementation is moved into Mercurial
core. The maturation period helped us to get a clearer picture of what was
needed. During the upstreaming process, we can use this clearer picture to
clean up the code and upgrade it to an appropriate quality for Mercurial core.

Please don’t forget to update and run the tests when you fix a bug or
add a feature. To run the tests, you need a working copy of Mercurial,
say in $HGSRC:

$ cd tests
$ python $HGSRC/tests/run-tests.py

Branch policy

The evolve test are highly impacted by changes in core. To deal with this, we use named branches.

There are two main branches: “stable” and “default”. Tests on these branch are
supposed to pass with the corresponding “default” and “stable” branch from core
Mercurial. The documentation is built from the tip of stable.

In addition, we have compatibility branches to check tests on older version of
Mercurial. They are the “mercurial-x.y” branches. They are used to apply
expected test change only, no code change should happen there.

test output change from a changeset in core should adds the following line to their description: